
Starting today, Nexus One users will begin to receive the Android 2.2 (codenamed Froyo) over-the-air software update on their phones. This update provides some great new features including support for making your handset a portable hotspot and support for Adobe Flash within the browser. For a complete list of everything we’ve included in Android 2.2, please see the Android 2.2 Platform Highlights.
In order to access the update, you will receive a message on your phone's notification bar. Just download the update, wait for it to install, and you should be all set. This update will be rolled out gradually to phones - and most users will receive the notification by the end of the week. We hope you enjoy these new features.
Google had previously stated the Nexus One (or so-called Google phone) would be the first to get Froyo. Additionally, the Nexus One doesn't have the custom skins or layers of other devices, like TouchWiz or Sense, which make porting more difficult.

For those wondering, the creamy, yogurty Froyo will come to other devices. We've been promised some devices (such as the Evo 4G, Droid X, Droid) will get the update. The only question is when.
We haven't seen it on any of our T-Mobile or AT&T devices yet, but it is definitely coming for all (at least, all not on custom ROMs; they may have to resort to manual methods).